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參數(shù)資料
| 型號(hào)： | MAX750AMJA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Retriggerable Monostable Multivibrators 16-CDIP -55 to 125 |
| 中文描述： | 2 A SWITCHING REGULATOR, 210 kHz SWITCHING FREQ-MAX, CDIP8 |
| 封裝： | CERAMIC, DIP-8 |
| 文件頁(yè)數(shù)： | 8/16頁(yè) |
| 文件大?。?/td> | 206K |
| 代理商： | MAX750AMJA |
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M
Adjustable, S tep-Down,
Current-Mode PWM Regulators
8
_______________________________________________________________________________________
Overc urrent Limiting
The overcurrent comparator triggers when the load cur-
rent exceeds approximately 1.5A. On each clock
cycle, the output FET turns on and attempts to deliver
current until cycle-by-cycle or overcurrent limits are
exceeded. Note that the soft-start capacitor must be
greater than 0.01μF for overcurrent protection to func-
tion properly. A typical value is 0.1μF. A soft-start
cycle is initiated when the overcurrent comparator is
triggered.
Undervoltage Loc kout
The undervoltage lockout feature monitors the supply
voltage at V+ and allows operation to start when V+
rises above 3.75V. When V+ falls, operation continues
until the supply voltage falls below 3.50V. When an
undervoltage condition is detected, control logic turns
off the output power FET and discharges the soft-start
capacitor to ground. This prevents partial turn-on of
the power MOSFET and avoids excessive power dissi-
pation. The control logic holds the output power FET
off until the supply voltage rises above approximately
3.75V, at which time a soft-start cycle begins.
S hutdown Mode
The MAX750A/MAX758A are shut down by keeping
SHDN
at ground. In shutdown mode, the output power
FET is held off and the output drops to 0V. The internal
reference also turns off, which causes the soft-start
capacitor to discharge. The 6μA typical standby cur-
rent includes external-component leakage currents. As
temperature increases past +85°C, the external capaci-
1.23V
BANDGAP
1M
±35%
C6
0.01μF
R3
R2
R1
510K
C1
0.1μF
C5
330pF
R
F/F
S
Q
RAMP
GEN
CURRENT
SENSE AMP
OSC
RSENSE
OVERCURRENT COMPARATOR
VUVLO
SLOPE COMPENSATION
V
IN
BIAS
GEN
ERROR
AMP
SS CLAMP
UNDERVOLTAGE
LOCKOUT
PWM
COMPARATOR
SHDN
CC
GND
LX
D1
1N5817
C4
*
C2
1μF
C3
*
V
OUT
*
SEE TABLE 3 FOR COMPONENT VALUES AND SUPPLIERS.
L1
MAX750A
MAX758A
SS
V+
REF
Σ
Figure 1. Detailed Block Diagram with External Components
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| MAX750CPA | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX750CSA | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX750CSA-T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX750EPA | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX750ESA | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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